in a popular manner, and always from the point of view of human
interest--a point that is too seldom taken by writers on science.

ASTRONOMY WITH AN OPERA-GLASS.

A Popular Introduction to the Study of the Starry Heavens with the
simplest of Optical Instruments. Illustrated. 8vo. Cloth, $1.50.

"By its aid thousands of people who have resigned themselves to the
ignorance in which they were left at school, by our wretched system
of teaching by the book only, will thank Mr. Serviss for the
suggestions he has so well carried out."--_New York Times._

PLEASURES OF THE TELESCOPE.

A Descriptive Guide to Amateur Astronomers and All Lovers of the
Stars. Illustrated. 8vo. Cloth, $1.50.

"The volume will be found interesting by those for whom it is
written, and will inspire many with a love for the study of
astronomy, one of the most far-reaching of the
sciences."--_Milwaukee Journal._

D. APPLETON AND COMPANY, NEW YORK.



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